Dysfunction of the Thalamus and Sensory Perception

Consider the role of the thalamus in the brain's processing of sensory information. The thalamus is often referred to as the "gateway to the cortex" because it plays a crucial role in filtering and transmitting sensory information to the appropriate areas of the cerebral cortex. However, it also has implications for processing motor signals and regulating consciousness. In which of the following scenarios would a dysfunction in the thalamus most likely result in a significant impairment in sensory perception?